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【科学嬉游记】我们身边什么在利用能量——没油的小汽车
阳光灿烂的早晨，单倪准备去参观爸爸的工作单位，他非常开心，因为那是一座即将建成的游乐场。但是，爸爸驾驶的汽车突然跑的越来越慢...
科学嬉游记37/108
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